Causes of angina

Causes of Angina: Why the Heart Runs Short of Blood

Angina has one immediate cause - the heart muscle demanding more oxygen than narrowed arteries can deliver - and a set of deeper causes that narrow those arteries over years, per NHS guidance on angina.

The Underlying Cause: Coronary Artery Disease

In most people, angina comes from atherosclerosis: fatty plaques building up inside the coronary arteries over decades. The plaque narrows the channel; exertion outruns the narrowed supply; pain follows. A less common cause is coronary artery spasm - the artery muscle suddenly clamps down (variant angina), sometimes at rest, sometimes in normal-looking arteries. Rarer causes include severe anemia, an overactive thyroid, or heart-valve disease, all of which strain the supply-demand balance.

The Risk Factors That Build the Plaque

• Smoking: the single most damaging - injures artery walls and accelerates plaque
• High blood pressure: constant pressure damages the lining
• High cholesterol, especially high LDL - the raw material of plaque
• Diabetes: multiplies coronary risk several-fold
• Obesity and inactivity: feed all of the above
• Family history: early heart disease in parents or siblings raises your baseline
• Age and sex: risk climbs with age; men earlier, women catching up after menopause
• Chronic stress and poor sleep: real, measurable contributors

The Triggers That Bring On an Episode

Given narrowed arteries, episodes are provoked by:

• Physical exertion - climbing, hurrying, lifting
• Heavy meals - blood diverted to digestion
• Cold weather - arteries constrict
• Emotional stress or excitement - adrenaline raises the heart's demand
• Smoking or stimulants - direct vessel effects

The Classical Causation View

Classical Hridroga nidana lists read strikingly modern: heavy, greasy, excessive food; overexertion or its opposite; suppressed urges; chronic worry and fright (Bhaya, Chinta, Shoka); and Ama - metabolic sludge - obstructing the channels (Srotas) that serve the heart. The Medo-dushti (fat-tissue disturbance) angle maps onto cholesterol-driven disease. Interpretive, yes - but the classical prescription (lighter diet, managed stress, moderated exertion) is the same lifestyle correction modern cardiology prescribes.

Frequently Asked Questions

Can you have angina with normal arteries? Yes - coronary spasm (variant angina) and microvascular angina occur without major plaque, and still need cardiac care.

Does stress alone cause angina? Stress is both a trigger of episodes and a contributor to the disease. It does not create plaque overnight, but chronic stress measurably raises cardiac risk.

Is angina hereditary? The tendency is - family history of early heart disease raises your risk, though smoking, pressure, sugar and cholesterol decide much of what actually happens.

Can anemia cause angina? Severe anemia strains the oxygen supply to the heart and can provoke angina in narrowed arteries - one more reason anemia deserves treatment.